Garage door opener????????

For some reason when you click the remote or the wall remote,the door will not open or close fully without stopping.A series of ten light flashes follows.I know this is significant,and is trying to tell me the problem.The only thing is we bought this house used and i do not have an owners manual.Can anyone help me with this problem.

I would start by cleaning and then lubriocating the tracks, hinges, guide wheels and drive mechanism. Lubricat with a silicone spray lubricant. if this does not resolve the problem, the up annd down force adjustments may be off. If all else fails, buy a new genie screw drive opener :o)